Notes:

In 1864 or 1865, John, crossed Lake Huron to Alcona County, Michigan, where he worked in a sawmill and also homesteaded a farm.
According to the Marriage Record on July 13,1879, his residence was in Harrisville, Alcona County, Michigan.
He obviously came back to Canada at some point prior to that date to meet his intended bride (Anne McDonnell), who I would point out was 16 years his junior.
They are living in Harrisville per the 1880 Census.
They are living in Harrisville per the 1900 Census, with their 6 children.

John married Anne MCDONNELL on 13 Jul 1879 in St Eugene, Prescott County, Ontario. Anne (daughter of Alexander MCDONNELL and Mary MCDONALD) was born in 1860 in St Eugene, Prescott County, Ontario; died on 10 May 1939 in Bay City, Bay, Michigan, USA. [Group Sheet] [Family Chart]

Notes:

1900 US Census states that Annie (McDonnell) Stewart was the mother of 12 children, of which only 6 are living at the the time of the 1900 Census !!

Notes:

Per John A Stewart of Ypsilanti, Michigan: John Stewart and Margaret McDougall came from Scotland, where they were married.
According to family tradition, they landed first in Nova Scotia and lived there for a short while before moving to Glengarry County in Eastern Ontario.
There is circumstantial evidence that they emigrated to Canada in 1837 and lived on Cape Breton Island, Nova Scotia.
Perhaps they went from there to New Brunswick for seasonal work.
According to the 1861 Census of Canada, their daughter Betsy was born in New Brunswick obo 1839.
According to John Stewart, the family arrived in Glengarry County in 1839, they and appear there on the 1851 and 1861 Census.
A child named Mary Ann was born in Glengarry County and apparently died there as a 9 year old. She is not listed on the 1861 Census.
In 1860, they sold the lot in Lochiel Township that they had been farming.
Their daughter Isabella was alive at the time of the 1861 Census in Lochiel, Glengarry County. She is not listed on the 1871 Census in Bruce County.
Family legend has it that she died in a fire. One could suppose that this was the impetus to leave Glengarry County and head west to Bruce County.
In the early or mid 1860's they moved to Bruce County, where they are listed in an 1867 directory, and on the early tax rolls up until 1873.
In 1864 or 1865, their son John, crossed Lake Huron to Alcona County, Michigan, where he worked in a sawmill and also homesteaded a farm.
In 1868 their daughter Catherine was married in Goderich, to an Alexander McKenzie.
Shortly afterward she left with her husband for western Pennsylvania where the world's first oil boom was in full force.
Around 1873, James Stewart bought a farm in Alcona County near his brother John.
In 1880, John and Margaret are living in Harrisville, Alcona County, Michigan with their son James.
Not long after the 1881 Census for Ontario, Alexander moved with his family from Bruce County to Alcona County, Michigan.
Around the same time, Catherine with her husband and children showed up from Pennsylvania (the oil boom was over).
For about 15 years, the entire family was together in the Harrisville and Mikado areas of Alcona County.
John Sr died in 1889, Margaret in 1897, Catherine died in 1896.
The three youngest of the family - Alexander, Donald, and Hanah all left for for North Dakota around 1896 - as the lumber operations were shutting down or moving westward to Wisconsin or Minnesota.
Betsy, John and James remained in Michigan. Betsy died in 1905, John in 1909, and James in 1918.
There are many descendants who still live in Michigan.

John married Margaret MCDOUGALL. Margaret was born in 1811 in Scotland; died on 20 Feb 1897 in Alcona, Alcona, Michigan, USA; was buried in Saint Anne Cemetery, Harrisville, Alcona County, Michigan,USA. [Group Sheet] [Family Chart]

Alexander married Mary MCDONALD on 24 May 1858 in Prescott, Ontario, Canada. Mary was born in UNKNOWN; died in UNKNOWN. [Group Sheet] [Family Chart]